Shadowverse

Cost 8, body 3/3. Upon entering the game, deals 1 damage to a random enemy (important: enemy, not follower) as many times as there are cards in your hand. Most likely a legendary.

If the enemy has an empty board, this is essentially a Silver Bolt, but costing 1 less and also summoning a 3/3 follower. Although, for a legendary, it might be okay.

Cost 7, body 1/6. Ward. When a friendly follower dies, gains +1 attack. Maybe a gold card.

And a commander, right? Well, even Sword Maiden is better than this, almost the same, but 2 mana cheaper.

With Enhance, it transforms into a dragon, has stats of 7-4, and upon entering, deals 7 damage to all followers.

I think there are already plenty of such cards for mass damage/destruction. It would be better if it did something to protect your own units, perhaps. For example, "during the next player's turn, their followers gain immunity to damage from effects and spells." Then this card could be played well with dragon spells.

With this much necromancy (standard 6), it evolves all skeletons.

On evolution! That could work.
Well, overall, I like it, Kosh.